Improvement in springs to car-trucks



UNITED STATES CHARLES O-HLEMAOHER,

PATENT OEEICE.

OF AURORA, ILLINOIS.

IMPROVEMENT IN SPRINGS TO CAR-TRUCKS.

Specification forming part of Letters Patent No. 36,018, dated July 29, 1862.

To aZZ whom it may concern:

Be itknown that l, GHARLEs OHLEMAOHER, of Aurora, in the county of Kane and State of Illinois, have invented a new and useful Improvement in Applying Springs to Car- Trucks; and I do hereby declare that the fol- "lowing is a full, clear, and exact description of the same, reference being had to the ac companying drawings, making a part of this specification, in which- Figure l is a side-view of a car-truck having springs applied to it according to my invention; Fig. 2, a transverse section of the same taken in the line x x, Fig. 3; Fig. 3, a plan or top View of the same.

Similar letters of reference indicate corre sponding partsin'the several iigures.

This invention relates to an improvement in the application of elliptic or other springs to `car-trucks, whereby the same are rendered more durable than hitherto, being subjected to a uniform strain or weight, so as not to be overtaxed by the movement of the car during its lateral surging motions in passing over curves, 85e.

In the application of these springs tocartrueks two systems of springs have hitherto been employed, one at each side, and very frequently the greater portion of the Weight of the car and its contents, for the reason above stated, is thrown upon one system of springs at one side of the truck, and the former thereby overtaXed and liable to be broken or injured.` To obviate this difficulty I employ one system of springs only, placed transversely in the car-truck and arranged with levers in such a manner that the weight of the car will be transmitted equally to the springs, even when the former is oscillating from one side to the other.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

A represents a car-truck, and B its wheels, arranged and applied in the usual way. C represents a sill or center beam, which is placed loosely between two cross-bars, a a, at the center of the truck, and has two elliptic springs, D, attached to its under side.

The springs D are placed side by side, and at their lower part are connected to a cross-barE,

the ends of which are provided with journals a', which are fitted in oblong slots b in the adjoining ends of two levers, E E', so as to form ajoint for the same, as shown clearly in Fig. 2. The levers E Fare attached to crossbars c c, the ends of which are tted in the lower parts of pendants d, which are snspended from the cross-bars a a of the truck by pins c, the pendants being allowed to swing freely from the bars ct in a direction trans versely with the truck. The ends of the crossbars c form fulcra for the levers E E, and the l shorter arms of the latter are connected by joints c with the lower ends of bars f, which are secured to the sill or center beam, C, one near each end, as shown clearly in Fig. 2.

Each bar f is provided with an arm, g, which projects horizontally from it, and these arms at their outer ends are connected by links h with the inner ends of levers F F, there being two of the latter at each side of the cartruck. The levers F have their fulcra i in pendants j, attached to the truck-frame, and the outer ends or short arms of these levers bear on the boxes G of the axles of the wheels B, as shown in Fig. l.

From this description it will be seen that the weight of the car is transmitted to both the upper and lower sides of the springs D D, as the sill or center beam, C, on which the car rests, bears on the upper parts of the springs, and the ends of the former are connected by the bars f f and levers E E to the lower parts thereof; and it will also be seen that by means of the side levers, F, the springs D are connected with the center beam, C, and springs D. By this arrangement, therefore, only one system of springs is employed, and if these are made of sufiicient strength to support the weight of the car and its contents they cannot be overtaxed by the lateral surging of the car under motion, as is the case when two sepa rate and distinct systems of springs are employed, one at each side of the car. In this case it is evident that ifl the two systems of springs are made of suficient strength combined to sustain the car and its contents when the weight of the car is thrown on either system separately it will be overtaxed and liable to be broken or injured.

I do not confine myself to the precise ar- 2 y 36,018 I v rangement of the parts herein shorvn and deof levers, E' E F F, arranged and applied to scribed, for that may be varied or modified to the ear-truck, to operate as and for the pu'rsome extent and the same end attained. pose herein set forth.

Havino thus described my invention what I claim abs new, :tud desire to secure by fletters CHARLES OHLEMAGHER Patent, is- Witnesses:

The combination of one system of springs, D, J. S. ANDREWS, with a sill or center beam, C, and three systems J. G. BARR. 

